Multiway Switch, Radio Frequency System, and Communication Device

ABSTRACT

A multiway switch, a radio frequency system, and a communication device are provided. The multiway switch is configured to be coupled with an antenna system and a radio frequency circuit. The multiway switch has eight T ports and four P ports. The eight T ports include two first T ports, and each of the two first T ports is coupled with all the four P ports. The antenna system includes four antennas corresponding to the four ports. The multiway switch is configured to implement a function of transmitting a sounding reference signal (SRS) through the four antennas in turn.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims priority to Chinese Patent Application No.2018102209293, filed on Mar. 16, 2018, the entire disclosure of which ishereby incorporated by reference.

TECHNICAL FIELD

This disclosure relates to the field of communication technology, andparticularly to a multiway switch, a radio frequency system, and acommunication device.

BACKGROUND

With the widespread use of electronic devices such as smart phones, thesmart phone can support an increasing number of applications and isbecoming more and more powerful. The smart phone is developing in adiversified and personalized way, becoming indispensable electronicproducts in users' life. In the fourth generation (4G) mobilecommunication system, the electronic device generally adopts asingle-antenna or dual-antenna radio frequency (RF) system architecture.Currently, in a new radio (NR) system of the fifth generation (5G)mobile communication system, an electronic device supporting afour-antenna RF system architecture is proposed.

SUMMARY

Implementations of the disclosure provide a multiway switch, a radiofrequency system, and a communication system.

According to a first aspect of the implementations of the disclosure, amultiway switch is provided. The multiway switch has eight T ports andfour P ports. The eight T ports include two first T ports, and each ofthe two first T ports is coupled with all the four P ports. The multiwayswitch is configured to be coupled with a radio frequency circuit and anantenna system of a communication device. The antenna system includefour antennas corresponding to the four P ports. The multiway switch isconfigured to implement a function of transmitting a sounding referencesignal (SRS) through the four antennas in turn.

According to a second aspect of the implementations of the disclosure, aradio frequency system is provided. The radio frequency system includesan antenna system, a radio frequency circuit, and a multiway switchcoupled with the radio frequency circuit and the antenna system. Themultiway switch has eight T ports and four P ports. The eight T portsinclude two first T ports, and each of the two first T ports is coupledwith all the four P ports. The antenna system include four antennascorresponding to the four P ports. The multiway switch is configured toimplement a function of transmitting a sounding reference signal (SRS)through the four antennas in turn.

According to a third aspect of the implementations of the disclosure, acommunication device is provided. The communication device includes anantenna system, a radio frequency circuit, and a multiway switch coupledwith the radio frequency circuit and the antenna system. The multiwayswitch has eight T ports and four P ports. The eight T ports include twofirst T ports, and each of the two first T ports is coupled with all thefour P ports. The antenna system includes four antennas corresponding tothe four P ports. The multiway switch is configured to implement afunction of transmitting a sounding reference signal (SRS) through thefour antennas in turn.

BRIEF DESCRIPTION OF THE DRAWINGS

To describe technical solutions in implementations of the presentdisclosure or in the related art more clearly, the following brieflyintroduces the accompanying drawings required for describing theimplementations or the related art. Apparently, the accompanyingdrawings in the following description merely illustrate someimplementations of the present disclosure. Those of ordinary skill inthe art may also obtain other drawings based on these accompanyingdrawings without creative efforts.

FIG. 1A is a schematic structural diagram illustrating an electronicdevice according to an implementation of the disclosure.

FIG. 1B is a schematic structural diagram illustrating a 4P8T switchaccording to an implementation of the disclosure.

FIG. 1C is a schematic structural diagram illustrating anotherelectronic device according to an implementation of the disclosure.

FIG. 2 is a schematic structural diagram illustrating a radio frequencycircuit of an electronic device according to an implementation of thedisclosure.

FIG. 3 is a schematic structural diagram illustrating another radiofrequency circuit of an electronic device according to an implementationof the disclosure.

FIG. 4 is a schematic structural diagram illustrating another radiofrequency circuit of an electronic device according to an implementationof the disclosure.

FIG. 5 is a schematic structural diagram illustrating another radiofrequency circuit of an electronic device according to an implementationof the disclosure.

FIG. 6 is a schematic structural diagram illustrating another radiofrequency circuit of an electronic device according to an implementationof the disclosure.

FIG. 7A is a schematic structural diagram illustrating a receivercircuit according to an implementation of the disclosure.

FIG. 7B is a schematic structural diagram illustrating a transceivercircuit according to an implementation of the disclosure.

FIG. 8 is a schematic structural diagram illustrating an antenna systemof an electronic device according to an implementation of thedisclosure.

FIG. 9 is a schematic structural diagram illustrating another antennasystem of an electronic device according to an implementation of thedisclosure.

FIG. 10 is a schematic structural diagram illustrating a radio frequencysystem according to an implementation of the disclosure.

FIG. 11 is a schematic structural diagram illustrating a communicationdevice according to an implementation of the disclosure.

FIG. 12 is a schematic diagram illustrating a wireless charging receivercapable of multiplexing antennas of a communication device according toan implementation of the disclosure.

FIG. 13 is a schematic structural diagram illustrating a loop arrayantenna including four antennas according to an implementation of thedisclosure.

DETAILED DESCRIPTION

Technical solutions in implementations of the present disclosure will bedescribed clearly and completely hereinafter with reference to theaccompanying drawings of the implementations of the present disclosure.Apparently, the described implementations are merely some rather thanall implementations of the present disclosure. All other implementationsobtained by those of ordinary skill in the art based on theimplementations of the present disclosure without creative efforts shallfall within the protection scope of the present disclosure.

The terms “first”, “second”, and the like used in the specification, theclaims, and the accompany drawings of the present disclosure are used todistinguish different objects rather than describe a particular order.The terms “include”, “comprise”, and “have” as well as variationsthereof are intended to cover non-exclusive inclusion. For example, aprocess, method, system, product, or apparatus including a series ofsteps or units is not limited to the listed steps or units. Instead, itcan optionally include other steps or units that are not listed;alternatively, other steps or units inherent to the process, method,product, or device can also be included.

The term “embodiment” or “implementation” referred to herein means thata particular feature, structure, or characteristic described inconjunction with the implementation may be contained in at least oneimplementation of the present disclosure. The phrase appearing invarious places in the specification does not necessarily refer to thesame implementation, nor does it refer to an independent or alternativeimplementation that is mutually exclusive with other implementations. Itis explicitly and implicitly understood by those skilled in the art thatan implementation described herein may be combined with otherimplementations.

The communication device involved in the implementations of the presentdisclosure includes an electronic device or a network device, and theelectronic device may include various handheld devices, in-vehicledevices, wearable devices, computing devices that have wirelesscommunication functions, or other processing devices connected towireless modems, as well as various forms of user equipment (UE), mobilestations (MS), terminal devices, and the like. For the sake of easydescription, the above-mentioned devices are collectively referred as anelectronic device.

The network device may be a base station. The base station cancommunicate with one or more electronic devices, and can alsocommunicate with one or more base stations having part of functions ofthe electronic device (for example, a communication between a macro basestation and a micro base station, for example, between access points(APs)). The base station may be a base transceiver station (BTS) of atime division synchronous code division multiple access (TD-SCDMA)system, and also may be an evolutional node B (eNB) of a long termevolution (LTE) system, and also may be a base station of a new radio(NR) system of the fifth generation (5G) system. In addition, the basestation may be an AP, a transmission point, a central unit (CU) or othernetwork entity, and can include part of or all functions of the abovenetwork entities.

In the following implementations, the electronic device is taken as anexample to illustrate the communication device.

At present, sounding reference signal (SRS) switching in four antennasof a mobile phone is a mandatory option for China mobile communicationscorporation (CMCC) in the China mobile 5G Scale Test Technical WhitePaper_Terminal, which is optional in the 3rd generation partnershipproject (3GPP). The SRS is mainly for a base station to determinequality and parameters of four channels via measuring uplink signals ofthe four antennas of the mobile phone, and perform a beamforming of adownlink massive multi-input multi-output (MIMO) antenna array on thefour channels according to a channel reciprocity, and finally, thedownlink 4×4 MIMO is enabled to obtain the best data transmissionperformance. The 4×4 MIMO refers to that the base station has fourantennas to transmit data and the terminal device has four antennas toreceive data.

In order to satisfy requirements of the SRS switching in the fourantennas, the implementations of the present disclosure provide a radiofrequency architecture based on a simplified 4P8T antenna switch.Compared with a 3P3T/DPDT/multiway small switch switching scheme, thepresent switching scheme can reduce the number of series switches ineach path (all or part of switches are integrated into the 4P8T switch),thereby reducing link loss and optimizing the overall transmission andreception performance of the terminal. The implementations of thepresent disclosure are described in detail below.

Referring to FIG. 1A, FIG. 1A is a schematic structural diagramillustrating an electronic device 100 according to an implementation ofthe disclosure. The electronic device 100 supports a dual-frequencysingle-transmit mode, that is, the electronic device 100 can supportdual frequency band-one uplink transmit path or dual frequency band-fourdownlink receive paths. The electronic device includes a multiway switch10, an antenna system 20, and a radio frequency circuit 30. The antennasystem 20 includes four antennas. The multiway switch 10 includes eightT ports and four P ports. The eight T ports include two first T ports,and each first T port is fully coupled with the four P ports, that is,each first T port is coupled with all of the four P ports. The four Pports and the four antennas are in a one-to-one coupling relationship,that is, each of the four ports is coupled with a corresponding antennaof the four antennas.

The multiway switch 10 is coupled with the radio frequency circuit 30and the antenna system 20 to implement a preset function of theelectronic device 100. The preset function is a function of transmittingan SRS through the four antennas in turn, which can be understood as afour-port SRS transmit function.

The electronic device may be a 5G NR mobile phone terminal or other 5GNR terminal device, for example, a customer premise equipment (CPE) or amobile Wifi.

“P port” in the implementation of the present disclosure is theabbreviation of “polarized port”, which refers to ports coupled with theantennas. “T port” in the implementations of the present disclosure isthe abbreviation of “throw port”, which refers to ports coupled with theradio frequency circuit. In the implementation of the presentdisclosure, four P ports and eight T ports are included. Forunderstanding the multiway switch 10 intuitively, in the implementationof the present disclosure, the multiway switch 10 is also referred as a4P8T switch.

In the implementation of the present disclosure, the full coupling isdefined for the T port, and indicates that the T port is coupled withall the P ports. The first T port is a fully coupled port, and iscoupled with the four P ports.

The transmitting an SRS through the four antennas in turn refers to aprocess in which the electronic device 100 interacts with a base stationbased on a polling mechanism to determine quality of an uplink channelcorresponding to each of the four antennas.

The eight T ports further include six second T ports. Each second T portis independently coupled with one of the four P ports, that is, onesecond T port is merely coupled with one P port, and one P port may becoupled with different second T ports. The second T ports correspondingto the same frequency band are coupled with different P ports. The fourP ports are coupled with the four antennas, and the four P ports and thefour antennas are in a one-to-one correspondence relationship. The firstT ports at least support a transmit function, that is, the first T portscan be configured to transmit radio frequency signals, and also can beconfigured to receive and transmit radio frequency signals. The second Tports merely support a receive function, that is, the second T ports ismerely configured to receive radio frequency signals.

The six second T ports include three second T ports for receiving radiofrequency signals of a first frequency band and three second T ports forreceiving radio frequency signals of a second frequency band, and thefirst frequency band and the second frequency band are not overlapped.

That the P ports coupled with the T ports corresponding to the samefrequency band are different from each other refers to that the P portscoupled with the T ports for receiving radio frequency signals of thesame frequency band are different from each other. For example, thesecond T port 1 is configured to receive radio frequency signals of thefirst frequency band, the second T port 2 is configured to receive radiofrequency signals of the first frequency band, the second T port 1 iscoupled with the P port 1, the second T port 2 is coupled with the Pport 2, and the P port 1 is different from the P port 2.

Independent coupling is defined for the T ports, and refers to that oneT port is merely coupled with one P port. In the implementation of thepresent disclosure, the six second T ports are ports of independentcoupling.

The first frequency band and the second frequency band are 5G NRfrequency bands. For the sake of easy illustration, “NR Band Nx” is usedto indicate the first frequency band supported by the 5G NR electronicdevice, and “NR Band Ny” is used to indicate the second frequency bandsupported by the 5G NR electronic device. For example, the firstfrequency band is 3.3 GHz-3.8 GHz, and the second frequency band is 4.4GHz-5 GHz. Alternatively, the first frequency band is 4.4 GHz-5 GHz, andthe second frequency band is 3.3 GHz-3.8 GHz.

In the implementation of the present disclosure, the eight T ports areclassified into first T ports and second T ports. The first T ports arefully coupled ports, and the number of the first T ports are two. Onefirst T port is configured to transmit and receive radio frequencysignals of the NR Band Nx, and the other first T port is configured totransmit and receive radio frequency signals of the NR Band Ny. Thesecond T ports are ports of independent coupling, and the number of thesecond T ports is six. The six second T ports include three second Tports for receiving radio frequency signals of the NR Band Nx and threesecond T ports for receiving radio frequency signals of the NR Band Ny.

Referring to FIG. 1B, FIG. 1B is a schematic structural diagramillustrating a 4P8T switch according to an implementation of the presentdisclosure. As illustrated in FIG. 1B, one first T port is an “NR BandNx TRX1” port and is configured to receive and transmit radio frequencysignals of the NR Band Nx, and the other first T port is an “NR Band NyTRX1” port and is configured to receive and transmit radio frequencysignals of the NR Band Ny. The six second T ports are respectively an“NR Band Nx RX2” port, an “NR Band Ny RX2” port, an “NR Band Nx RX3”port, an “NR Band Ny RX3” port, an “NR Band Nx RX4” port, and an “NRBand Ny RX4” port. The four P ports are a P1 port, a P2 port, a P3 port,and a P4 port, respectively. The “NR Band Nx TRX1” port is coupled withthe P1 port, the P2 port, the P3 port, and the P4 port, respectively,and the “NR Band Ny RX1” port is coupled with the P1 port, the P2 port,the P3 port, and the P4 port, respectively. The “NR Band Nx RX2” port,the “NR Band Nx RX3” port, and the “NR Band Nx RX4” port are the portsconfigured to receive radio frequency signals of the NR Band Nx. The “NRBand Ny RX2” port, the “NR Band Ny RX3” port, and the “NR Band Ny RX4”port are the ports configured to receive radio frequency signals of theNR Band Ny. To avoid a co-channel interference, the P portsindependently coupled with the three second T ports configured toreceive radio frequency signals of the NR Band Nx are different fromeach other, and the P ports independently coupled with the three secondT ports configured to receive radio frequency signals of the NR Band Nyare different from each other. In FIG. 1B, the “NR Band Nx RX2” port andthe “NR Band Ny RX2” are coupled with the P1 port, the “NR Band Nx RX3”port and the “NR Band Ny RX3” port are coupled with the P3 port, and the“NR Band Nx RX4” port and the “NR Band Ny RX4” port are coupled with theP4 port. What needs to be illustrated is that a connection manner inwhich the second T ports are coupled with the P ports are merely apossible example, and what is needed is that the condition that the Pports independently coupled with the three second T ports configured toreceive radio frequency signals of the first frequency band aredifferent from each other and the P ports independently coupled with thethree second T ports configured to receive radio frequency signals ofthe second frequency band are different from each other is satisfied.

The coupling, independent coupling, full coupling, or other kinds ofcoupling between the T ports and the P ports of the multiway switch 10illustrated in the implementations of the disclosure refers to that theT ports are coupled with the P ports through first switch transistors.The first switch transistors are configured to control a communicationbetween the T ports and the P ports (including a one-way communicationfrom the T ports to the P ports and a one-way communication from the Pports to the T ports). The first switch transistor may be, for example,a switch array including three field effect transistors (for example,metal-oxide-semiconductor (MOS) transistors). When the first switchtransistor is disconnected and not grounded, parasitic parameters (suchas a parasitic capacitance, a parasitic inductance, and so on) greatlyaffect performance of other connected ports. Therefore, the first switchtransistor is implemented with three MOS transistors. When the firstswitch transistor is disconnected, two MOS transistors at two ends aredisconnected and one MOS transistor in the middle is grounded. Besidesthe first switch transistors between the T ports and the P ports, themultiway switch 10 further includes second switch transistors merelyarranged adjacent to the T ports and second switch transistors merelyarranged adjacent to the P ports. The second switch transistor can alsobe referred as a grounding switch transistor. Each T port can beprovided with one grounding switch transistor, and each P port can alsobe provided with one grounding switch transistor. When the T ports orthe P ports are not used to perform signal transmission and signalreception, the corresponding grounding switch transistors are switchedon, and when the T ports or the P ports perform signal reception orsignal transmission, the corresponding grounding switch transistors areswitched off. The second switch transistor is configured to activate acorresponding port (T port or P port) and may be, for example, a MOStransistor. The specific configurations of the first switch transistorand the second switch transistor are not limited herein. In animplementation, the electronic device 100 can control conduction ofpaths between the T ports and the P ports through the first switchtransistors. In an implementation, the electronic device 100 can beprovided with a dedicated controller coupled with the switch transistorsof the multiway switch 10.

The multiway switch 10 includes the field effect transistors. Forexample, it is assumed that eight T ports are included and the multiwayswitch includes the field effect transistors, among the eight T ports,if each T port is fully coupled with the four P ports, the number of thefield effect transistors of the multiway switch is 4+8*4*3+4=104; ifonly two T ports are fully coupled with the four P ports, the number ofthe field effect transistors of the multiway switch is8+(2*4+(8−2)*1)*3+4=54. Obviously, applying the implementation of thepresent disclosure, the number, the volume, and the cost of the fieldeffect transistors of the 4P8T switch can be reduced, thereby improvingperformance.

In addition, the electronic device 100 further includes a radiofrequency transceiver. The radio frequency transceiver is coupled withthe radio frequency circuit, and the radio frequency transceiver, theradio frequency circuit, the multiway switch, and the antenna systemconstitute the radio frequency system of the electronic device.

By way of limiting the number of the T ports fully coupled with the fourP ports, the number of the switches of the radio frequency system of theelectronic device can be effectively reduced. The number of the T portsof full coupling affects the performance of the radio frequency system.

Alternatively, referring to FIG. 1C, FIG. 1C is a schematic structuralview illustrating an electronic device according to an implementation ofthe present disclosure. As illustrated in FIG. 1C, the electronic device100 includes a radio frequency transceiver and three independent circuitmodules. One independent circuit module includes a transceiver circuit,where the transceiver circuit is formed by coupling a first transmitpath supporting transmission of radio frequency signals of the NR BandNx and a first receive path supporting reception of radio frequencysignals of the NR Band Nx. Another independent circuit module includes atransceiver circuit, where the transceiver circuit is formed by couplinga second transmit path supporting transmission of radio frequencysignals of the NR Band Ny and a second receive path supporting receptionof radio frequency signals of the NR Band Ny. Another independentcircuit module includes six receiver circuits, where the six receivercircuits are respectively a third receive path supporting reception ofradio frequency signals of the NR Band Nx, a fourth receive pathsupporting reception of radio frequency signals of the NR Band Ny, afifth receive path supporting reception of radio frequency signals ofthe NR Band Nx, a sixth receive path supporting reception of radiofrequency signals of the NR Band Ny, a seventh receive path supportingreception of radio frequency signals of the NR Band Nx, and an eighthreceive path supporting reception of radio frequency signals of the NRBand Ny.

In the implementation of the present disclosure, the radio frequencytransceiver is configured to transmit and receive radio frequencysignals. In an uplink, the radio frequency transceiver is configured toconvert baseband signals into emission radio frequency signals. Theemission radio frequency signals are processed by the transceivercircuit such as amplified and filtered by the transceiver circuit, andthe processed emission radio frequency signals are converted by theantenna into electromagnetic waves of a specified frequency band to beemitted out. In a downlink, the antenna receives the electromagneticwaves of the specified frequency band, converts the electromagneticwaves into radio frequency signals, processes such as amplifies andfilters the radio frequency signals, and transmits the processed radiofrequency signals to the radio frequency transceiver. The radiofrequency transceiver is configured to demodulate the received radiofrequency signals into baseband signals to be processed by a basebandchip.

In the implementation of the present disclosure, the transceiver circuithas one transmit port, one receive port, and one transmit-receive port.Each receiver circuit has one receive port and one transmit port. The“transmit-receive port”, “transmit port”, and “receive port” of thetransceiver circuit refer to ports formed after integration of onetransmitter circuit and one receiver circuit. The transmit-receive portis configured to transmit and receive radio frequency signals, thetransmit port is configured to transmit radio frequency signals, and thereceive port is configured to receive radio frequency signals. It shouldbe noted that the ports such as transmit ports, receive ports, andtransmit-receive ports illustrated in the figures are exemplary and donot intent to indicate an exact port position and impose anyrestrictions.

The multiway switch 10 has two first T ports and six second T ports. Asillustrated in FIG. 1C, the two first ports are respectively andcorrespondingly coupled with the transmit-receive ports of the twotransceiver circuits. The six second T ports are respectively andcorrespondingly coupled with the receive ports of the six receivercircuit. Three of the six second T ports configured to receive radiofrequency signals of the NR Band Nx are respectively coupled with thereceive port of the third receiver circuit, the receive port of thefifth receiver circuit, and the receive port of the seventh receivercircuit. Three of the six second T ports configured to receive radiofrequency signals of the NR Band Ny are respectively coupled with thereceive port of the fourth receiver circuit, the receive port of thesixth receiver circuit, and the receive port of the eighth receivercircuit.

Since the radio frequency transceiver needs to be adapted to the twotransceiver circuits and the six receiver circuits, the radio frequencytransceiver at least has two transmit ports and eight receive ports. Asillustrated in FIG. 1C, the radio frequency transceiver has two transmitports: TX_Nx port and TX_Ny port, and eight receive ports: RX1_Nx port,RX1_Ny port, RX2_Nx port, RX2_Ny port, RX3_Nx port, RX3_Ny port, RX4_Nxport, and RX4_Ny port. The TX_Nx port is coupled with the receive portof one of the transceiver circuits, the RX1_Nx port is coupled with thetransmit port of the one of the transceiver circuits, the TX_Ny port iscoupled with the receive port of the other transceiver circuit, theRX1_Ny is coupled with the transmit port of the other transceivercircuit, the RX2_Nx port is coupled with the transmit port of the thirdreceiver circuit, the RX3_Nx port is coupled with the transmit port ofthe fifth receiver circuit, the RX4_Nx port is coupled with the transmitport of the seventh receiver circuit, the RX2_Ny port is coupled withthe transmit port of the fourth receiver circuit, the RX3_Ny port iscoupled with the transmit port of the sixth receiver circuit, and theRX4_Ny port is coupled with the transmit port of the eighth receivercircuit.

It can be seen that in the implementation, the electronic deviceincludes the antenna system, the radio frequency circuit, and themultiway switch. The antenna system includes the four antennas. Themultiway switch includes the eight T ports and the four P ports. Themultiway switch is coupled with the radio frequency circuit and theantenna system to realize transmitting an SRS through the four antennasof the electronic device in turn.

In a possible implementation, the radio frequency circuit includes atleast one independent circuit module. The at least one independentcircuit module has first ports and second ports. The first ports includetransmit-receive ports, and the second ports include receive ports. Thefirst ports and the first T ports are in a one-to-one couplingrelationship, and the second ports and the second T ports are in aone-to-one coupling relationship.

The transmit-receive ports of the independent circuit module correspondto ports after integration of a transmitter circuit and a receivercircuit. The transmit ports of the independent circuit module correspondto the ports of the transmitter circuit. The receive ports of theindependent circuit module correspond to the ports of the receivercircuit.

It can be seen that in the implementation, the radio frequency circuitadapted to the multiway switch at least includes one independent circuitmodule, thus it is advantageous to improve flexibility of adapting andreduce cost.

In a possible implementation, as illustrated in FIG. 2, under thecondition that one independent circuit module is included, theindependent circuit module includes two signal transmission-receptioncircuits, six receiver circuits, two first ports, and six second ports.Each transceiver circuit includes one receiver circuit and onetransmitter circuit. A transmit-receive port of each transceiver circuitis coupled with one first port of the independent circuit module. Areceive port of each of the six transceiver circuits is coupled with onesecond port of the independent circuit module.

It can be seen that in the implementation, the radio frequency circuitmerely includes one independent circuit module, has a high degree ofintegration, and occupies small space, thereby reducing cost.

In a possible implementation, as illustrated in FIG. 3, under thecondition that two independent circuit modules are included, the twoindependent circuit modules include a first independent circuit moduleand a second independent circuit module. Each independent circuit moduleincludes one transceiver circuit, three receiver circuits, one firstport, and three second ports. The transceiver circuit includes onereceiver circuit and one transmitter circuit. A transmit-receive port ofeach transceiver circuit is coupled with one first port of theindependent circuit module which includes the transceiver circuit. Areceive port of each receiver circuit is coupled with one second port ofthe independent circuit module which includes the receiver circuit.

It can be seen that in the implementation, the radio frequency circuitincludes two independent circuit modules, the number of the independentcircuit modules is small, the radio frequency circuit has a high degreeof integration, and occupies small space, thereby reducing cost. Inaddition, the two independent circuit modules have the same structure,thereby reducing manufacturing cost.

In a possible implementation, under the condition that two independentcircuit modules are included, the two independent circuit modulesinclude a first independent circuit module and a second independentcircuit module. The first independent circuit module includes twotransceiver circuits and two first ports. Each transceiver circuitincludes one receiver circuit and one transmitter circuit. Atransmit-receive port of each transceiver circuit is coupled with onefirst port of the independent circuit module which includes thetransceiver circuit. The second independent circuit module includes sixreceiver circuits and six second ports. A receive port of each receivercircuit is coupled with one second port of the independent circuitmodule which includes the receiver circuit.

It can be seen that in the implementation, the radio frequency circuitincludes two independent circuit modules, the number of the independentcircuit modules is small, the radio frequency circuit has a high degreeof integration, and occupies small space, thereby reducing cost.

In a possible implementation, for the radio frequency circuit asillustrated in FIG. 1C, under the condition that three independentcircuit modules are included, the three independent circuit modulesinclude a first independent circuit module, a second independent circuitmodule, and a third independent circuit module. The first independentcircuit module and the second independent circuit module both includeone transceiver circuit and one first port. The transceiver circuitincludes one receiver circuit and one transmitter circuit, and atransmit-receive port of each transceiver circuit is coupled with thefirst port of the independent circuit module which includes thetransceiver circuit. The third independent circuit module includes sixreceiver circuits and six second ports. A receive port of each receivercircuit is coupled with one second port of the independent circuitmodule which includes the receiver circuit.

In a possible implementation, under the condition that three independentcircuit modules are included, the three independent circuit modulesinclude a first independent circuit module, a second independent circuitmodule, and a third independent circuit module. The first independentcircuit module and the second independent circuit module both includeone transceiver circuit, one receiver circuit, one first port, and onesecond port. The third independent circuit module includes four receivercircuits and four second ports. Each transceiver circuit includes onereceiver circuit and one transmitter circuit. A transmit-receive port ofeach transceiver circuit is coupled with the first port of theindependent circuit module which includes the transceiver circuit. Areceive port of each receiver circuit is coupled with the second port ofthe independent circuit module which includes the receiver circuit.

It can be seen that in the implementation, the radio frequency circuitincludes three independent circuit modules, the number of theindependent circuit modules is small, the radio frequency circuit has ahigh degree of integration, and occupies a small space, thus cost isreduced. In addition, two independent circuit modules have the samestructure, multiplexing of modules is improved, and manufacturing costis reduced.

In a possible implementation, as illustrated in FIG. 4, under thecondition that three independent circuit modules are included, the threeindependent circuit modules include a first independent circuit module,a second independent circuit module, and a third independent circuitmodule. The first independent circuit module and the second independentcircuit module both include one transceiver circuit, two receivercircuits, one first port, and two second ports. The third independentcircuit module includes two receiver circuits and two second ports. Eachtransceiver circuit includes one receiver circuit and one transmittercircuit. A transmit-receive port of each transceiver circuit is coupledwith the first port of the independent circuit module which includes thetransceiver circuit. A receive port of each receiver circuit is coupledwith the second port of the independent circuit module which includesthe receiver circuit.

It can be seen that in the implementation, the radio frequency circuitincludes three independent circuit modules, the number of theindependent circuit modules is small, the radio frequency circuit has ahigh degree of integration, and occupies a small space, thus cost isreduced. In addition, two independent circuit modules have the samestructure, multiplexing of modules is improved, and manufacturing costis reduced.

In a possible implementation, as illustrated in FIG. 5, under thecondition that four independent circuit modules are included, the fourindependent circuit modules include a first independent circuit module,a second independent circuit module, a third independent circuit module,and a fourth independent circuit module. The first independent circuitmodule and the second independent circuit module both include onetransceiver circuit and one first port. Each transceiver circuitincludes one receiver circuit and one transmitter circuit. Atransmit-receive port of the transceiver circuit is coupled with thefirst port of the independent circuit module which includes thetransceiver circuit. The third independent circuit module and the fourthindependent circuit module both include three receiver circuits andthree second ports. A receive port of each receiver circuit is coupledwith one second port of the independent circuit module which includesthe receiver circuit.

It can be seen that in the implementation, the radio frequency circuitincludes four independent circuit modules, two of the four independentcircuit modules are the same, and another two of the four independentcircuit modules are the same, thus multiplexing of modules is improved,and manufacturing cost is reduced.

In a possible implementation, under the condition that four independentcircuit modules are included, the four independent circuit modulesinclude a first independent circuit module, a second independent circuitmodule, a third independent circuit module, and a fourth independentcircuit module. The first independent circuit module and the secondindependent circuit module both include one transceiver circuit, onereceiver circuit, one first port, and one second port. The thirdindependent circuit module and the fourth independent circuit moduleboth include two transceiver circuits and two second ports. Thetransceiver circuit includes one receiver circuit and one transmittercircuit. A transmit-receive port of each transceiver circuit is coupledwith the first port of the independent circuit module which includes thetransceiver circuit. A receive port of each receiver circuit is coupledwith the second port of the independent circuit module which includesthe receiver circuit.

It can be seen that in the implementation, the radio frequency circuitincludes four independent circuit modules, two of the four independentcircuit modules are the same, and another two of the four independentcircuit modules are the same, thus multiplexing of modules is improved,and manufacturing cost is reduced.

In a possible implementation, as illustrated in FIG. 6, under thecondition that five independent circuit modules are included, the fiveindependent circuit modules include a first independent circuit module,a second independent circuit module, a third independent circuit module,a fourth independent circuit module, and a fifth independent circuitmodule. The first independent circuit module and the second independentcircuit module both include one transceiver circuit and one first port.The transceiver circuit includes one receiver circuit and onetransmitter circuit. A transmit-receive port of each transceiver circuitis coupled with the first port of the independent circuit module whichincludes the transceiver circuit. The third independent circuit module,the fourth independent circuit module, and the fifth independent circuitmodule all include two receiver circuits and two second ports. A receiveport of each receiver circuit is coupled with the second port of theindependent circuit module which includes the receiver circuit.

It can be seen that in the implementation, the radio frequency circuitinclude five independent circuit modules, two of the five independentcircuit modules are the same, and the remaining independent circuitmodules of the five independent circuit modules are the same, thusmultiplexing of modules is improved, and manufacturing cost is reduced.

In a possible implementation, under the condition that six independentcircuit modules are included, the six independent circuit modulesinclude a first independent circuit module, a second independent circuitmodule, a third independent circuit module, a fourth independent circuitmodule, a fifth independent circuit module, and a sixth independentcircuit module. The first independent circuit module and the secondindependent circuit module both include one transmitter circuit, onereceiver circuit, one first port, and one second port. A transmit portof each transmitter circuit is coupled with the first port of theindependent circuit module which includes the transmitter circuit. Areceive port of each receiver circuit is coupled with the second port ofthe independent circuit module which includes the receiver circuit. Thethird independent circuit module, the fourth independent circuit module,the fifth independent circuit module, and the sixth independent circuitmodule all include one receiver circuit and one second port. A receiveport of each receiver circuit is coupled with the second port of theindependent circuit module which includes the receiver circuit.

In a possible implementation, under the condition that seven independentcircuit modules are included, the seven independent circuit modulesinclude a first independent circuit module, a second independent circuitmodule, a third independent circuit module, a fourth independent circuitmodule, a fifth independent circuit module, a sixth independent circuitmodule, and a seventh independent circuit module. The first independentcircuit module includes two transceiver circuits and two first ports.Each transceiver circuit includes one receiver circuit and onetransmitter circuit. A transmit-receive port of each transceiver circuitis coupled with the first port of the independent circuit module whichincludes the transceiver circuit. The second independent circuit module,the third independent circuit module, the fourth independent circuitmodule, the fifth independent circuit module, the sixth independentcircuit module, and the seventh independent circuit module all includeone receiver circuit and one second port. A receive port of eachreceiver circuit is coupled with the second port of the independentcircuit module which includes the receiver circuit.

What needs to be illustrated is that implementations of the radiofrequency circuit may be various, and the present disclosure is notlimited thereto. In addition, the first ports coupled withtransmit-receive ports of different transceiver circuits are differentfrom each other, and the second ports coupled with receive ports ofdifferent receiver circuits are different from each other.

In a possible implementation, as illustrated in FIG. 7A, the receivercircuit includes one low noise amplifier (LNA) and one filter. An inputport of the filter is coupled with the second port of the independentcircuit module, an output port of the filter is coupled with an inputport of the LNA, and an output port of the LNA is coupled with acorresponding port of the radio frequency transceiver.

In a possible implementation, as illustrated in FIG. 7B, the transceivercircuit includes one LNA, one power amplifier (PA), one filter, onecoupler, and one switch. An input port of the LNA and an output port ofthe PA are coupled with the switch, the switch is coupled with thefilter, the filter is coupled with the coupler, and the coupler iscoupled with the first port of the independent module.

As illustrated in FIG. 7B, the transceiver circuit includes one receivercircuit and one transmitter circuit. When the input port of the LNA isselected via the switch, the receiver circuit is conducted, radiofrequency signals are received through the first port, the coupler, thefilter, the switch, and the LNA. When the output port of the poweramplifier is selected via the switch, the transmitter circuit isconducted, and radio frequency signals are transmitted through the PA,the switch, the filter, the coupler, and the first port.

What needs to be illustrated is that implementations of the receivercircuit and the transceiver circuit may be various, and the presentdisclosure is not limited thereto.

In a possible implementation, the four antennas include a first antenna,a second antenna, a third antenna, and a fourth antenna. The firstantenna, the second antenna, the third antenna, and the fourth antennaare operable at the 5G NR frequency band.

The 5G NR frequency band may include, for example, 3.3 GHz to 3.8 GHzand 4.4 GHz to 5 GHz.

In a possible implementation, the four antennas include a first antenna,a second antenna, a third antenna, and a fourth antenna. The firstantenna and the fourth antenna are operable at an LTE frequency band andthe 5G NR frequency band. The second antenna and the third antenna aremerely operable at the 5G NR frequency band.

The first antenna and the fourth antenna are intended to support DL 4×4MIMO for some frequency bands of an LTE terminal, and two of receiveantennas of the LTE terminal are shared with antennas operable at the 5GNR. The LTE frequency band may include, for example, 1880 Hz-1920 MHzand 2496 Hz-2690 MHz.

In a possible implementation, as illustrated in FIG. 8, the antennasystem further includes a first combiner and a second combiner. Thefirst combiner has a first port coupled with the first antenna, a secondport coupled with a first receive path in LTE 4×4 MIMO of the electronicdevice, and a third port coupled with a corresponding P port of themultiway switch. The second combiner has a first port coupled with thefourth antenna, a second port coupled with a second receive path in theLTE 4×4 MIMO of the electronic device, and a third port coupled with acorresponding P port of the multiway switch.

The LTE 4*4 MIMO is a downlink LTE receive circuit and can be defined asa third receive path. Since the LTE currently has two receive paths, inorder to support the LTE 4×4 MIMO, a third receive path and a fourthreceive path are added.

According to performance of the four antennas, the electronic devicearranges one antenna with better performance for primary receive (PRx)for a standby mode. Moreover, first T ports in the switch having boththe transmission function and the reception function can be configuredfor Tx and PRx functions, and thus the antennas can be switchedarbitrarily. In this way, there is no need to restrict the couplingports of shared antennas.

In a possible implementation, as illustrated in FIG. 9, the antennasystem further includes a first single-pole double-throw (SPDT) switchand a second SPDT switch. The first SPDT switch has a first port coupledwith the first antenna, a second port coupled with the first receivepath in the LTE 4×4 MIMO of the electronic device, and a third portcoupled with a corresponding P port of the multiway switch. The secondSPDT switch has a first port coupled with the fourth antenna, a secondport coupled with the second receive path in the LTE 4×4 MIMO of theelectronic device, and a third port coupled with a corresponding P portof the multiway switch.

Referring to FIG. 10, FIG. 10 is a schematic structural diagramillustrating a radio frequency system according to an implementation ofthe disclosure. The radio frequency system includes an antenna system, aradio frequency circuit, and the multiway switch according to any of theimplementations above. The multiway switch is coupled with the radiofrequency circuit and the antenna system. The multiway switch has eightT ports and four P ports. The eight T ports include two first T ports,and each of the two first T ports is coupled with all the four P ports.The antenna system include four antennas corresponding to four P ports.The multiway switch is configured to implement a function oftransmitting an SRS through the four antennas in turn.

It can be see that for a transmit path and a receive path of the radiofrequency system of the electronic device, the transmit path may includeone independent 4P8T switch, or include one independent SPDT switch andone independent 4P8T switch. The receive path may include oneindependent 4P8T switch, or may include one independent SPDT switch andone independent 4P8T switch. By means of integrating more switchfunctions of the transmit path and the receive path of the radiofrequency system into the 4P8T switch, the number of the independentswitches of the transmit path and the receive path can be effectivelyreduced.

Referring to FIG. 11, FIG. 11 is a schematic structural diagramillustrating a communication device according to an implementation ofthe disclosure. The communication device includes an antenna system, aradio frequency circuit, and the multiway switch described in any of theimplementations above. The multiway switch is coupled with the radiofrequency circuit and the antenna system. The multiway switch has eightT ports and four P ports. The eight T ports include two first T ports,and each of the two first T ports is coupled with all the four P ports.The antenna system include four antennas corresponding to four P ports.The multiway switch is configured to implement communication function oftransmitting an SRS through the four antennas in turn.

In addition, as illustrated in FIG. 12, the four antennas in the antennasystem illustrated in the implementations of the disclosure can also bemultiplexed by a wireless charging receiver of the electronic device.The wireless charging receiver includes a receive antenna and a receivecontrol circuit. The receive antenna matches transmit antennas of awireless charging transmitter (resonates at the same or similarfrequency and transfers energy in a wireless manner in the way ofradiative resonant magnetic coupling). The receive control circuitconverts, through a loop array antenna, the energy into a direct current(DC) to output to charge a battery. The receive control circuit candynamically adjust a frequency of the loop array antenna and match thefrequency of the loop array antenna with frequencies of the transmitantennas of the wireless charging transmitter to achieve pairedcharging. Alternatively, the receive control circuit interacts with thewireless charging transmitter in real time on a frequency change rangeto implement an “exclusive encryption” wireless charging mode.

The receive antenna may be an antenna include at least one of the fourantennas (in the case of multiple antennas, the multiple antennas arestrobed via switches).

For example, as illustrated in FIG. 13, the receive antenna is a looparray antenna including the four antennas described above. The fourantennas include an antenna 1, an antenna 2, an antenna 3, and anantenna 4. The antenna 1 and the antenna 4 are operable at both the LTEfrequency band and the 5G NR frequency band, while the antenna 2 and theantenna 3 are just operable at the 5G NR frequency band. A port of theantenna 1 and a port of the antenna 4 are used as ports of the looparray antenna. Adjacent antennas are coupled via a gate circuit 170 withan isolation function. The gate circuit 170 includes a spacer 171 and aswitch 172, where the spacer 171 is a conductor and the switch 172 isfurther coupled with a controller. The electronic device can switch onthe switch 172 of each gate circuit 170 in a wireless charging mode toform a loop array antenna to receive energy. By adding the spacers 171among the antennas, the gate circuit 170 can reduce mutual couplingamong the multiple antennas of the electronic device in a normalcommunication mode, improve isolation among the multiple antennas, andoptimize performance of the antennas. On the other hand, the multipleantennas can be coupled in series to form the loop array antenna throughthe switches 172, so as to better match the transmit antennas totransfer energy. Furthermore, since the antenna 1 and the antenna 4 havecapabilities stronger than that of the antenna 2 and the antenna 3, theloop array antenna thus arranged can reduce energy loss in transmissionas much as possible.

The above is the implementations of the implementations of the presentdisclosure. It shall be pointed out that a person ordinarily skilled inthe art can make some improvements and polishes without departing fromthe principle of the implementations of the present disclosure. Theseimprovements and polishes shall be construed to be the protection rangeof the present disclosure.

What is claimed is:
 1. A multiway switch, comprising: eight T ports andfour P ports, the eight T ports comprising two first T ports, each ofthe two first T ports being coupled with all the four P ports; and themultiway switch being configured to be coupled with a radio frequencycircuit and an antenna system of a communication device, the antennasystem comprising four antennas corresponding to the four P ports, themultiway switch being configured to implement a function of transmittinga sounding reference signal (SRS) through the four antennas in turn. 2.The multiway switch of claim 1, wherein: the eight T ports furthercomprise six second T ports, each of the six second T ports is coupledwith one of the four P ports, and the second T ports configured toreceive radio frequency signals of the same frequency band are coupledwith different P ports; and the four P ports and the four antennas arein a one-to-one coupling relationship, the first T ports are configuredto at least support a transmit function, and the second T ports areconfigured to merely support a receive function.
 3. The multiway switchof claim 2, wherein the radio frequency circuit comprises at least oneindependent circuit module; the at least one independent circuit modulehas first ports and second ports, the first ports comprisetransmit-receive ports, and the second ports comprise receive ports; andthe first ports and the first T ports are in a one-to-one couplingrelationship, and the second ports and the second T ports are in aone-to-one coupling relationship.
 4. The multiway switch of claim 3,wherein the radio frequency circuit comprises one independent circuitmodule, the independent circuit module comprises two transceivercircuits, six receiver circuits, two first ports, and six second ports;and each of the two transceiver circuits comprises one receiver circuitand one transmitter circuit, each of the two transceiver circuits has atransmit-receive port coupled with one first port of the independentcircuit module, and each of the six receiver circuits has a receive portcoupled with one second port of the independent circuit module.
 5. Themultiway switch of claim 3, wherein the radio frequency circuitcomprises two independent circuit modules, the two independent circuitmodules comprise a first independent circuit module and a secondindependent circuit module; each of the two independent circuit modulescomprises one transceiver circuit, three receiver circuits, one firstport, and three second ports; and each transceiver circuit comprises onereceiver circuit and one transmitter circuit, each transceiver circuithas a transmit-receive port coupled with the first port of theindependent circuit module which comprises the transceiver circuit, andeach receiver circuit has a receive port coupled with one second port ofthe independent circuit module which comprises the receiver circuit. 6.The multiway switch of claim 3, wherein the radio frequency circuitcomprises three independent circuit modules, the three independentcircuit modules comprise a first independent circuit module, a secondindependent circuit module, and a third independent circuit module; thefirst independent circuit module and the second independent circuitmodule both comprise one transceiver circuit and one first port, thetransceiver circuit comprises one receiver circuit and one transmittercircuit, and each transceiver circuit has a transmit-receive portcoupled with the first port of the independent circuit module whichcomprises the transceiver circuit; and the third independent circuitmodule comprises six receiver circuits and six second ports, eachreceiver circuit has a receive port coupled with one second port of theindependent circuit module which comprises the receiver circuit.
 7. Themultiway switch of claim 3, wherein the radio frequency circuitcomprises four independent circuit modules, the four independent circuitmodules comprise a first independent circuit module, a secondindependent circuit module, a third independent circuit module, and afourth independent circuit module; the first independent circuit moduleand the second independent circuit module both comprise one transceivercircuit and one first port, the transceiver circuit comprises onereceiver circuit and one transmitter circuit, and each transceivercircuit has a transmit-receive port coupled with the first port of theindependent circuit module which comprises the transceiver circuit; andthe third independent circuit module and the fourth independent circuitmodule both comprise three receiver circuits and three second ports,each receiver circuit has a receive port coupled with one second port ofthe independent circuit module which comprises the receiver circuit. 8.The multiway switch of claim 3, wherein the radio frequency circuitcomprises five independent circuit modules, the five independent circuitmodules comprise a first independent circuit module, a secondindependent circuit module, a third independent circuit module, a fourthindependent circuit module, and a fifth independent circuit module; thefirst independent circuit module and the second independent circuitmodule both comprise one transceiver circuit and one first port, eachtransceiver circuit comprises one receiver circuit and one transmittercircuit, and each transceiver circuit has a transmit-receive portcoupled with the first port of the independent circuit module whichcomprises the transceiver circuit; and the third independent circuitmodule, the fourth independent circuit module, and the fifth independentcircuit module all comprise two receiver circuits and two second ports,each receiver circuit has a receive port coupled with one second port ofthe independent circuit module which comprises the receiver circuit. 9.The multiway switch of claim 3, wherein: a receiver circuit comprisesone low noise amplifier (LNA) and one filter, the filter has an inputport coupled with the second ports of the independent circuit module,and an output port coupled with an input port of the LNA, and an outputport of the LNA is coupled with a corresponding port of a radiofrequency transceiver of the communication device; and a transceivercircuit comprises one LNA, one power amplifier (PA), one filter, onecoupler, and one switch, an input port of the LNA and an output port ofthe PA are coupled with the switch, the switch is coupled with thefilter, the filter is coupled with the coupler, and the coupler iscoupled with the first ports of the independent circuit module.
 10. Themultiway switch of claim 1, wherein the multiway switch is consisted offield effect transistors, and the number of the field effect transistorsof the multiway switch is
 54. 11. The multiway switch of claim 1,wherein the four antennas comprise a first antenna, a second antenna, athird antenna, and a fourth antenna; and the first antenna, the secondantenna, the third antenna, and the fourth antenna are all operable at afifth generation new radio (5G NR) frequency band.
 12. The multiwayswitch of claim 1, wherein the four antennas comprise a first antenna, asecond antenna, a third antenna, and a fourth antenna; the first antennaand the fourth antenna are operable at a long term evolution (LTE)frequency band and a 5G NR frequency band; and the second antenna andthe third antenna are merely operable at the 5G NR frequency band. 13.The multiway switch of claim 12, wherein the antenna system furthercomprises a first combiner and a second combiner; the first combiner hasa first port coupled with the first antenna, a second port coupled witha first receive path in LTE 4×4 multiple-input multiple-output (MIMO) ofthe wireless communication device, and a third port coupled with acorresponding P port of the multiway switch; and the second combiner hasa first port coupled with the fourth antenna, a second port coupled witha second receive path in the LTE 4×4 MIMO of the wireless communicationdevice, and a third port coupled with a corresponding P port of themultiway switch.
 14. The multiway switch of claim 12, wherein theantenna system further comprises a first single-pole double-throw (SPDT)switch and a second SPDT switch; the first SPDT switch has a first portcoupled with the first antenna, a second port coupled with a firstreceive path in LTE 4×4 MIMO of the wireless communication device, and athird port coupled with a corresponding P port of the multiway switch;and the second SPDT switch has a first port coupled with the fourthantenna, a second port coupled with a second receive path in the LTE 4×4MIMO of the wireless communication device, and a third port coupled witha corresponding P port of the multiway switch.
 15. A radio frequencysystem comprising: an antenna system, a radio frequency circuit, and amultiway switch coupled with the radio frequency circuit and the antennasystem; the multiway switch having eight T ports and four P ports, theeight T ports comprising two first T ports, each of the two first Tports being coupled with all of the four P ports; the antenna systemcomprising four antennas corresponding to the four P ports; and themultiway switch being configured to implement a function of transmittinga sounding reference signal (SRS) through the four antennas in turn. 16.The radio frequency system of claim 15, wherein: the eight T portsfurther comprise six second T ports, each of the six second T ports iscoupled with one of the four P ports, and the second T ports configuredto receive radio frequency signals of the same frequency band arecoupled with different P ports; and the four P ports and the fourantennas are in a one-to-one coupling relationship, the first T portsare configured to at least support a transmit function, and the second Tports are configured to merely support a receive function.
 17. The radiofrequency system of claim 15, wherein the radio frequency circuitcomprises at least one independent circuit module; the at least oneindependent circuit module has first ports and second ports, the firstports comprise transmit-receive ports, and the second ports comprisereceive ports; and the first ports and the first T ports are in aone-to-one coupling relationship, and the second ports and the second Tports are in a one-to-one coupling relationship.
 18. A communicationdevice, comprising: an antenna system, a radio frequency circuit, and amultiway switch coupled with the radio frequency circuit and the antennasystem; the multiway switch having eight T ports and four P ports, theeight T ports comprising two first T ports, each of the two first Tports being coupled with all of the four P ports; the antenna systemcomprising four antennas corresponding to the four P ports; and themultiway switch being configured to implement a function of transmittinga sounding reference signal (SRS) through the four antennas.
 19. Thecommunication device of claim 18, wherein: the eight T ports furthercomprise six second T ports, each of the six second T ports is coupledwith one of the four P ports, and the second T ports configured toreceive radio frequency signals of the same frequency band are coupledwith different P ports; and the four P ports and the four antennas arein a one-to-one coupling relationship, the first T ports are configuredto at least support a transmit function, and the second T ports areconfigured to merely support a receive function.
 20. The communicationdevice of claim 18, wherein: the radio frequency circuit comprises atleast one independent circuit module; the at least one independentcircuit module has first ports and second ports, the first portscomprise transmit-receive ports, and the second ports comprise receiveports; and the first ports and the first T ports are in a one-to-onecoupling relationship, and the second ports and the second T ports arein a one-to-one coupling relationship.